Bukkit

This Plugin will add the four Seasons to Minecraft

Metropolis generates a protected city for your users and assigns them homes.

SkyGridGen is a world generator for Bukkit servers

Don't let your players enter a world (forever or temporarly) if they die in it.

Eternal Ice

OrePlus

Sky Island Generator

Save, load, reset any worlds.

A nether generator for minecraft/bukkit

Survival Games Automated

MultipleWorlds

Diggy Hole

This mod Spawn Random Structures every minute.

A plugin to redistribute ores according to Geological Principles

WorldCreator

A pretty easy-to-use in-game biome editor (requires WorldEdit to work)

Generates a world full of planets

Jump in to the Whooshing Well and be whisked away to a far away land

RandomEncounters adds configurable random structure, treasure, and mob generation to the world

Temporary discussion page/forum & hopeful placeholder